With almost 30,000 tags, it would be nice to be able to sponsor very low traffic tags. The low volume tags are actually quite interesting. For example, if you have a business repairing altair computers, it would be great to be able to sponsor the one question tagged altair.

Tongue not in cheek - I bet the official answer would be a riff on, "It depends." with a request for more information on the tag you want to sponsor.
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Adam DavisNov 26 '09 at 5:12

7

+1 for freehand circles and the correct answer. Tag sponsorship is avaiable to advertisers who buy most of the ads for a tag. So yes, "it depends" widely on the tag, etc.
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Alex PapadimoulisNov 26 '09 at 16:14